<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>腾讯课堂-个人中心</title>
    <style>
        .test{
            width:100px;
            height:100px;
            background: red;;
        }

    </style>
</head>
<body>
<div class="test"></div>
</body>
</html>
